tofsee | 0bd0d596230aa3958d9f54bd43d3de94685dd9f7ed3e8bd0b5c1a01d48d7e34e

General

Target

106162a9e72052611f27b255db7a5d53.exe
Size

10.7MB
MD5

106162a9e72052611f27b255db7a5d53
SHA1

b2c8f9a1c6cd769bdad4d45b3e340b28e0bb2092
SHA256

0bd0d596230aa3958d9f54bd43d3de94685dd9f7ed3e8bd0b5c1a01d48d7e34e
SHA512

0b5966e406ba6c3d861e5b982a539a51c836a8fb08fd1c9295f17c108d29ae72ad687689eadb9fe3540924afab949598dd6f2108f7498d79edffa2a93a7b9ec9
SSDEEP

49152:3nHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH:3

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.6

lazystax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
4784	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\kucdgdbd\ImagePath = "C:\\Windows\\SysWOW64\\kucdgdbd\\hbdgzyy.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation	106162a9e72052611f27b255db7a5d53.exe

Deletes itself 1 IoCs

pid	Process
4156	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1800	hbdgzyy.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1800 set thread context of 4156	1800	hbdgzyy.exe	110

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
3388	sc.exe
3508	sc.exe
1764	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3732	2532	WerFault.exe	90
1196	1800	WerFault.exe	106

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2532 wrote to memory of 1320	2532	106162a9e72052611f27b255db7a5d53.exe	95
PID 2532 wrote to memory of 1320	2532	106162a9e72052611f27b255db7a5d53.exe	95
PID 2532 wrote to memory of 1320	2532	106162a9e72052611f27b255db7a5d53.exe	95
PID 2532 wrote to memory of 1976	2532	106162a9e72052611f27b255db7a5d53.exe	98
PID 2532 wrote to memory of 1976	2532	106162a9e72052611f27b255db7a5d53.exe	98
PID 2532 wrote to memory of 1976	2532	106162a9e72052611f27b255db7a5d53.exe	98
PID 2532 wrote to memory of 3388	2532	106162a9e72052611f27b255db7a5d53.exe	100
PID 2532 wrote to memory of 3388	2532	106162a9e72052611f27b255db7a5d53.exe	100
PID 2532 wrote to memory of 3388	2532	106162a9e72052611f27b255db7a5d53.exe	100
PID 2532 wrote to memory of 3508	2532	106162a9e72052611f27b255db7a5d53.exe	102
PID 2532 wrote to memory of 3508	2532	106162a9e72052611f27b255db7a5d53.exe	102
PID 2532 wrote to memory of 3508	2532	106162a9e72052611f27b255db7a5d53.exe	102
PID 2532 wrote to memory of 1764	2532	106162a9e72052611f27b255db7a5d53.exe	104
PID 2532 wrote to memory of 1764	2532	106162a9e72052611f27b255db7a5d53.exe	104
PID 2532 wrote to memory of 1764	2532	106162a9e72052611f27b255db7a5d53.exe	104
PID 1800 wrote to memory of 4156	1800	hbdgzyy.exe	110
PID 1800 wrote to memory of 4156	1800	hbdgzyy.exe	110
PID 1800 wrote to memory of 4156	1800	hbdgzyy.exe	110
PID 1800 wrote to memory of 4156	1800	hbdgzyy.exe	110
PID 1800 wrote to memory of 4156	1800	hbdgzyy.exe	110
PID 2532 wrote to memory of 4784	2532	106162a9e72052611f27b255db7a5d53.exe	108
PID 2532 wrote to memory of 4784	2532	106162a9e72052611f27b255db7a5d53.exe	108
PID 2532 wrote to memory of 4784	2532	106162a9e72052611f27b255db7a5d53.exe	108

C:\Users\Admin\AppData\Local\Temp\106162a9e72052611f27b255db7a5d53.exe
"C:\Users\Admin\AppData\Local\Temp\106162a9e72052611f27b255db7a5d53.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2532
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kucdgdbd\
  2⤵
  PID:1320
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hbdgzyy.exe" C:\Windows\SysWOW64\kucdgdbd\
  2⤵
  PID:1976
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kucdgdbd binPath= "C:\Windows\SysWOW64\kucdgdbd\hbdgzyy.exe /d\"C:\Users\Admin\AppData\Local\Temp\106162a9e72052611f27b255db7a5d53.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3388
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description kucdgdbd "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3508
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kucdgdbd
  2⤵
  - Launches sc.exe
  PID:1764
- C:\Windows\SysWOW64\netsh.exe
  "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
  2⤵
  - Modifies Windows Firewall
  PID:4784
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2532 -s 808
  2⤵
  - Program crash
  PID:3732

C:\Windows\SysWOW64\kucdgdbd\hbdgzyy.exe
C:\Windows\SysWOW64\kucdgdbd\hbdgzyy.exe /d"C:\Users\Admin\AppData\Local\Temp\106162a9e72052611f27b255db7a5d53.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1800
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4156
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1800 -s 516
  2⤵
  - Program crash
  PID:1196

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 1800 -ip 1800
1⤵
PID:5004

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 2532 -ip 2532
1⤵
PID:1212

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\hbdgzyy.exe

Filesize
12.0MB

MD5
460e1aea8b21a54e4cc80f3a556feb38

SHA1
7f13d6724be2f742088671340671a7e93d22ae4b

SHA256
6c95b5fe8b7b53c880bd7cb53ce1cb8330579d31f114066bcadf51d31eb025d3

SHA512
33885448113e774704436fe74d114eb9b3faf747dc0314636ad539bec7ba7a1fa9a718655911cb951cdfed080722c013d6e9dfbcb992bfede9c740c09039fc5f

Download Submit
C:\Windows\SysWOW64\kucdgdbd\hbdgzyy.exe

Filesize
2.0MB

MD5
527cec11aa05d2c63cd1b6f81be78b2a

SHA1
a342ab4f07b1b4b99735a1f51958987d2340ca11

SHA256
407467cba3b16aa396e2debe32b679de8ef6ca827cf8a33f122e9e45038d5fc9

SHA512
562c66aca2c0eb69aaa50fed43e5bfb212c70f06c3e5dcb1ae4d613dafd41512b5671e192cbeda4236fbed534b3bc55ecc5132cd7b6a2196f07e496eef543416

Download Submit
memory/1800-11-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/1800-10-0x0000000000D70000-0x0000000000D83000-memory.dmp

Filesize
76KB

Download
memory/1800-18-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/1800-9-0x0000000000F00000-0x0000000001000000-memory.dmp

Filesize
1024KB

Download
memory/2532-16-0x0000000000D70000-0x0000000000E70000-memory.dmp

Filesize
1024KB

Download
memory/2532-7-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/2532-1-0x0000000000D70000-0x0000000000E70000-memory.dmp

Filesize
1024KB

Download
memory/2532-15-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/2532-4-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/2532-2-0x0000000002820000-0x0000000002833000-memory.dmp

Filesize
76KB

Download
memory/4156-12-0x0000000000A10000-0x0000000000A25000-memory.dmp

Filesize
84KB

Download
memory/4156-17-0x0000000000A10000-0x0000000000A25000-memory.dmp

Filesize
84KB

Download
memory/4156-20-0x0000000000A10000-0x0000000000A25000-memory.dmp

Filesize
84KB

Download
memory/4156-21-0x0000000000A10000-0x0000000000A25000-memory.dmp

Filesize
84KB

Download
memory/4156-22-0x0000000000A10000-0x0000000000A25000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads